The field of track detection using solid state nuclear track detectors (SSNTDs) is being constantly developed for last couple of years. Track detectors are being increasingly used in various fields like Biomedical, Environmental, Anthropological, Nuclear sciences and Space research. For newer and more innovative applications of these detectors a systematic study on the effects of external factors such as exposure to radiation, on their physical and chemical properties is essential. Modifications induced by irradiation may sometimes enable in achieving the desired and improved physical and chemical properties of the detectors for specific use. Acknowledging the importance of this work, an effort has been made through this book, to present a comprehensive account of studies on gamma irradiation effect on different types of polymeric nuclear track detectors.